David later got these placed in a custom rack in early 1971.Two main heads powered four 4×12” WEM speaker cabinets while the third head was a spare.March 1964 - Moved to Morden, Surrey (The maisonette).
While working his day job, young Reeves also started working evenings in a small room over Plato Music on Crown Passage in Morden from 1964-1968.
He fixed things at first, repairing hifi sets and televisions as well.
Dave Reeves, who had been working for Sound City between 1966-68, had started his own company called Hiwatt and by January 1969 he began making custom 100w heads for local musicians and bands like Jethro Tull and The Who are seen using Hiwatts in May later that year.
David used only two Hiwatt heads throughout the autumn of ’69 and the more familiar three heads setup appeared sometime during the summer in 1970.
Harry Joyce was a military-certified wiring technician, and as a result, all Hiwatts produced during the Harry Joyce era were produced at military-spec levels.
Military specifications required that products being made be wired in such a way that components would be easily accessible and that the wiring itself would remain "clean".It was founded by drum shop owner and drummer Jim Marshall, and is now based in Bletchley, Milton Keynes, Buckinghamshire.Marshall's guitar amplifiers are among the most recognised in the world. This signature sound was conceived by Marshall after guitarists, such as Pete Townshend, visiting Marshall's drum shop complained that the guitar amplifiers then on the market didn't have the right sound or enough volume.Hiwatt is a British company who manufactures amplifiers for electric guitars and electric basses.Starting in the late 1960s, together with Marshall and Vox, Hiwatt contributed to the sonic image popularly termed "British sound".The cover on Ummagumma also reveals two Sound City L100 amps, but it’s more likely that these belonged to either Waters or Wright as David went straight from Selmer to Hiwatt sometime during July 1969, – a relationship that would last almost uninterrupted for 40 years.